Strategic Environmental Research and Development Program (SERDP), Project ER-1706, 39 pp, Feb 2012
This report describes a fieldable microchip capillary electrophoresis (MCE) device that is selective for perchlorate and exhibits reduced analysis times and reagent consumption. The device employs contact conductivity detection and zwitterionic surfactant chemistry to resolve perchlorate selectively from abundant environmental species such as chloride, nitrate, and sulfate. The prototype MCE system is capable of detection limits of 3.4 ± 1.8 ppb in standards and 5.6 ± 1.7 ppb in drinking water. Additional work modified the microchip geometry and separation chemistry to account for higher ionic strength sample matrices, such as surface and groundwater, which cause interferences with perchlorate detection. A novel extraction method incorporating the fundamentals of electrostatic ion chromatography is presented as a way to overcome this challenge. Two extraction formats, employing either a packed bed or a monolith, also were investigated and presented in this work. http://www.serdp-estcp.org/content/download/13996/164606/file/ER-1706-FR
The Technology Innovation News Survey welcomes your comments and
suggestions, as well as information about errors for correction. Please
contact Michael Adam of the U.S. EPA Office of Superfund Remediation
and Technology Innovation at email@example.com or (703) 603-9915
with any comments, suggestions, or corrections.
Mention of non-EPA documents, presentations, or papers does not constitute a U.S. EPA endorsement of their contents, only an acknowledgment that they exist and may be relevant to the Technology Innovation News Survey audience.